SquirrelJME/SquirrelJME

// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the GNU General Public License v3+, or later.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.runtime.media.midi;

/**
 * This contains static helper methods for the MIDI format.
 *
 * @since 2022/04/24
 */
public final class MidiUtils
{
    /**
     * Not used.
     * 
     * @since 2022/04/24
     */
    private MidiUtils()
    {
    }
    
    /**
     * Returns the length of the MIDI event.
     * 
     * @param __type The event type.
     * @return The length of the event in bytes or {@code -1} if undefined.
     * @since 2022/04/24
     */
    public static int midiMessageLength(int __type)
    {
        // Three byte
        if ((__type >= 0x80 && __type <= 0xBF) ||
            (__type >= 0xE0 && __type <= 0xEF) ||
            (__type == 0xF2))
            return 3;
        
        // Two byte
        else if ((__type >= 0xC0 && __type <= 0xDF) || (__type == 0xF3))
            return 2;
        
        // Single byte
        else if ((__type == 0xF1) || (__type >= 0xF4 && __type <= 0xFF))
            return 1;
        
        // Unknown/Undefined
        return -1;
    }
}